From publisher blurb: This 10-page PDF, written by Sam Witt, provides a dozen secrets the dwarves keep from the rest of the world and ways in which you can use those secrets in your campaign. When determining which secrets to use in a campaign, it is important to remember that not all of these secrets are designed to work in the same campaign. The "World Machine" and "Guardians of the Core" present incompatible views of the world, for example. These optional secrets can provide you with unique flavor for your dwarf character and assist you in planning or developing any dwarf character for a player or NPC.